Page 1: Table Of Contents
39LA,LB,LC,LD,LF,LG,LH03-25 Indoor Air-Handling Units Installation, Start-Up and Service Instructions CONTENTS Water and Steam Coil Piping Recommendations . .33 • GENERAL Page • WATER COILS SAFETY CONSIDERATIONS ....2 •...
Page 2: Safety Considerations
Fan Shaft Bearing Removal ....57 WARNING Fan and Shaft Removal ..... . . 59 Lubrication .
Page 3: Introduction
INTRODUCTION Unit Identification The 39L units are identified by the 18-digit part number listed on the serial plate. The part number describes all component, coil, motor, drive, and control selections. See Fig. 1-9 for unit identification. 39LA 39LC 39LG 39LB HORIZONTAL DRAW-THRU 39LD 39LH...
Page 4 A S 4 28N – Coil Model Number Hand – Right Hand Coil Type – Left Hand A – Chilled Water – Non-ferrous Coil Orientation S – Slant V – Vertical Rows Tube Size (Copper) A – 0 .016 Std. H-Pin B –...
Page 5 E V 4 28N – Coil Model Number Hand – Right Hand Coil Type – Left Hand E – Direct Expansion – Standard (varies with coil) Coil Orientation S – Slant V – Vertical Rows Tube Size (Copper) A – 0 .016 Std. H-Pin B –...
Page 6 K 2 12 10 B A 1250 Safety Factor 28L – Drive Package Model Number – 1 Set Belt 1.5 Safety Factor Drive Type V – Variable Speed Fan Speed rpm – Constant Speed Position 12 is 0 if rpm is 3 digits Fan Type –...
Page 7 PRE-HEAT WATER PRE-HEAT STEAM LEGEND COMB. — Combination — Preheat POS. — Position Factory-installed option components Fig. 8 — Position 4, Unit Configuration Model (Component Sequence Also Shown)
Page 8 PRIMARY COIL/FAN SECTIONS Fan Configurations Available Configurations Upblast Rear Discharge Upblast Front Discharge Top Horizontal Front Discharge Fan Section Access Hinged Door on Hand Side 39LB – HORIZONTAL COOLING 39LC – HORIZONTAL COOLING/HEATING 39LA – HORIZONTAL COOLING SMALL FACE AREA SMALL FACE AREA LARGE FACE AREA a39-4447...
Page 9 Table 1 — Section Dimensions and Weights SECTION DIMENSIONS (in.) AND WEIGHTS (lb) Nominal cfm at 500 fpm 1,500 3,000 4,000 5,000 6,000 7,500 9,000 10,500 12,500 Unit Size Height (in.) LA, LB, LC, LG 24.3 28.2 32.1 32.1 32.1 40.0 43.9 43.9...
Page 10: Preinstallation
PREINSTALLATION Suspended Units Figure 12 shows overhead suspension of unit using optional Check items received against packing list. Notify Carrier of factory-supplied suspension channels. any discrepancy. Each support channel consists of 2 pieces, the smaller of which Refer to Fig. 10 for service area requirements.
Page 11 DIMENSIONS (mm) SIZE 39LA 39LB 39LC 1162 1159 1262 1259 1462 1459 1653 1659 1653 1659 1653 1659 1040 1000 1962 1959 1040 1000 1962 1959 1240 NOTE: Dimensions are in inches, ( ) are in mm. DIMENSIONS (ft-in.) SIZE 39LA 39LB 39LC...
Page 12 Table 2 — Additional Component Weights UNIT SIZE TYPICAL DRY COIL WEIGHTS (lb) Large Face Area Cooling Coils, 1/2 in. OD (Chilled Water & DX)* 4-Row 6-Row Small Face Area Cooling Coils, 1/2 in. OD (Chilled Water & DX)* 4-Row 6-Row 8-Row Hot Water Coils, 1/2 in.
Page 13 Table 2 — Additional Component Weights (cont) UNIT SIZE HEATING COILS Hot Water 1/2 in. OD Tube, U-Bend (1, 2 Row) Face Area (sq ft) 2.72 4.72 6.58 7.95 9.32 12.12 13.98 17.1 20.5 Number Tubes/Face Finned Tube Length (in.) 26.1 34.0 37.9...
Page 14: Installation
Unscrew the flanges (top and sides) around the coil/fan section and the accessory section. See Fig. 15. CAUTION Ensure that a good seal is created between both sections before continuing. A poor seal may result in equipment damage. NOTE: If the section-to-section gasket installed at the factory is 7/16 IN.
Page 15: Mixing Box
AB 1/4-3/4 SCREWS AB 1/4-5/8 SCREWS Fig. 16 — Base Rail Split — Screws Mixing Box DAMPER ACTUATORS The 39L mixing boxes are supplied with low leak dampers and blade and edge seals. Damper operating torques are shown in Table 3. The actuator and mounting brackets are field supplied and may be LEGEND mounted inside or outside the unit.
Page 16 Fig. 18 — Typical Mixing Box Actuator Mounting Table 4 — Recommended Actuators ROUND DAMPER AREA MAXIMUM ACCESSORY SHAFT (sq ft) MAXIMUM ACTUATOR VOLTAGE TIMING TORQUE WIRE PACKAGE SIZE STROKE PART NO. (50/60 Hz) (sec) (in.-lb) LENGTH MIN-MAX (degrees) Parallel Opposed (ft) (in.)
Page 17 NOTES: 1. Hand is determined by the location of the fan drive and/or coil connection when viewed while facing the direction toward which air is flowing. 2. Dimensions are in inches, ( ) are in millimeters. DIMENSIONS (ft-in.) UNIT 39L- 2- 3-9/16 3- 1-7/8 2- 0-1/4...
Page 18: Install Condensate Drain
See Table for motor and drive package data. Since 2001, all 1-hp and greater motors supplied by Carrier for the 39L series air handling units are designed and constructed for use with variable frequency drives. If a field-supplied motor is in- stalled, ensure the motor is suitable for use with a VFD.
Page 19: Motor Nameplate Data
Table 5 — Electrical Data — Premium Efficiency EISA Motor Nameplate Data Compliant Motors The 39 Series air-handling unit nameplates do not contain fan mo- tor electrical data. The units as manufactured, are certified to meet all requirements, including unit markings, of UL1995 “Standard ODP/OPSB T-FRAME MOTORS - 1800 RPM For Safety-Heating and Cooling Equipment.”...
Page 20: Fan Motor Starter
Set the HOA switch on the front of the starter to the OFF Fan Motor Starter position. When starter is factory-installed, it is wired to the motor and fully Verify that the fan can freely rotate and remove any loose tested before shipping.
Page 21: Vfd
Verify max fan rpm from label on fan sled. When variable frequency drive (VFD) is factory-installed, it is Verify motor Hz and nominal operating speed on motor wired to the motor and fully tested before shipment. Drive pro- nameplate. gramming is also done at the factory, including electronic over- Calculate the maximum frequency output from the VFD.
Page 22 Table 6 — VFD Data PROGRAMMED SETTINGS ABB PART MAX. CONTINUOUS MCCB FUSE AMPS OVERLOAD TRIP AMPS MAX. OUTPUT AMPS MOTOR HP NO. ACH550-UH- OUTPUT AMPS RATED AMPS 4 POLE / 2 POLE 4 POLE / 2 POLE 208-230 VOLT / 3 PHASE / 60 HZ (PROGRAMMED TO OPERATE AT 208 VOLTS) 04A6-2 1.8/ 3.0/...
Page 23 Table 7 — Air Handler VFD Factory-Set Parameters PARAMETER GROUP NUMBER DESCRIPTION VFD DRIVE ONLY PARAMETERS NUMBER 9902 Application Macro Supply Fan 9904 Motor Control Mode Scalar 9905 Motor Normal Voltage 9906 Motor Normal Current † 9907 Motor Normal Frequency 60 Hz or 50 Hz 9908 Motor Normal Speed...
Page 24 Table 7 — Air Handler VFD Factory-Set Parameters (cont) PARAMETER GROUP NUMBER DESCRIPTION VFD DRIVE ONLY PARAMETERS NUMBER 3415 Signal Parameter 3 Speed 3416 Signal 3 Minimum 3417 Signal 3 Maximum 30000 3418 Output 3 DSP From 3419 Output 3 DSP units 3420 Output 3 Minimum 3421...
Page 25 From a Field Supplied 4 Wire Static Pressure Transducer AI-2 Cable Shield Ground * 0-10 v dc Output Signal AI-2 Static Pressure Signal (+) 0 - 10 v dc AI-2 Static Pressure Signal (-) 0 - 10 v dc Field Supplied Input Connections 24 Vdc 10 10...
Page 26: Vfd Configuration
J1 – DIP Switches for Analog Inputs The switch is one of two types: Illustration of available switch positions; not default settings AI1: (in Voltage Position) AI2: (in Current Position) Alternate Original Examples: BOTH SWITCHES IN VOLTAGE POSITION BOTH SWITCHES IN CURRENT POSITION a39-4531 Fig.
Page 27: Vfd Modes
A stationary arrow indicates that the the parameters if desired. drive is stopped. For Carrier air handler units, the rotation is al- ways forward. 4. Press EXIT (SOFT KEY1) to exit the Changed Parame- ters mode.
Page 28: Upload All Parameters
Install Sheaves on Motor and Fan Shafts KEY 1). Factory-supplied drives are prealigned and tensioned, however, Carrier recommends that you check the belt tension and alignment When the download is complete, the text “Parameter down- before starting the unit. Always check the drive alignment after load successful”...
Page 29: Alignment
Fig. 28 — Determining Sheave-Shaft Overhang ALIGNMENT Make sure that fan shafts and motor shafts are parallel and level. The most common causes of mis-alignment are nonparallel shafts and improperly located sheaves. Where shafts are not parallel, belts on one side are drawn tighter and pull more than their share of the load.
Page 30: Install V-Belts
TENSION MEASUREMENT PROCEDURE Install V-Belts When installing or replacing belts, always use a complete set of Measure the belt span (see Fig. 30). new belts. Mixing old and new belts will result in the premature Position bottom of the large O-ring on the span scale at the wear or breakage of the newer belts.
Page 31 Table 8 — Fan Belt Tension Data BELT DEFLECTION FORCE (lb) SMALLEST SHEAVE SUPER GRIPBELTS AND UNNOTCHED GRIPNOTCH BELTS AND BELT STYLE RPM RANGE DIAMETER RANGE GRIPBANDS NOTCHED GRIPBANDS (in.) USED BELT NEW BELT USED BELT NEW BELT 1000-2500 3.0 - 3.6 2501-4000 1000-2500 3.8 - 4.8...
Page 32 Table 9 — Motor and Drive Package Data* DRIVE AVAILABILITY CENTER LINE MAX WIDTH RPM RANGE MOTOR DISTANCE (in.) SHEAVE (in.) UNIT SHAFT TEFC FRAME SIZE DIAM. (in.) TEFC 1/2† 1745 — — 3/4† 1934 1045 — — 143T 2143 1158 —...
Page 33: Water And Steam Coil Piping Recommendations
Piping practices are outlined in the Carrier System Design Manu- al, Part 3, Piping Design. See Tables -11 for circuiting data. WATER COILS Typically, coils are piped by connecting the supply at the bottom and the return at the top. See Fig. 32. This is not always the case, especially if the coil hand has been changed in the field.
Page 34 NOTE: Do NOT use an immersion thermostat to override a duct • Provide air vents for the coils to eliminate non-condensible thermostat and open the steam supply valve. gases. For vacuum return systems, the vacuum breaking check valve • Select a control valve according to the steam load, not the would be piped into the condensate line between the trap and the coils supply connection size.
Page 35 Table 11 — Chilled Water Coil Circuiting Data LARGE FACE AREA (39LA, 39LD) UNIT SIZE COIL Face Area (sq ft) CIRCUIT TYPE 3.63 5.90 7.90 9.54 11.18 Connection Connection Connection Connection Connection Circuits Size Circuits Size Circuits Size Circuits Size Circuits Size 1-1/2...
Page 36: Coil Freeze-Up Protection
NOTE: IDT coils must be installed with the tubes draining toward temperature drops below 165°F. Note that condensate drains are the header end of the coil. Carrier's IDT steam coils are pitched limited to 5 psig pressure. toward the header end as installed in the unit.
Page 37 Control Valve (Note 3) Control Valve (Note 2) Note 1 Note 1 Strainer Strainer Gate Valve Gate Valve 1/4 in. Pet Cock for 1/4" Pet Cock Steam Unit Continuous vent for Continuous Supply Unit Steam Supply Vent Main Main See Note 7 15°...
Page 38: Refrigerant Piping, Direct-Expansion (Dx) Coils
Check Valve refrigerant velocity. 12" Min. Refer to Carrier System Design Manual, Part 3, and size remain- Bucket Trap ing suction line to compressor for a pressure drop equivalent to (located below 2.0°F. This will provide a total suction line header pressure drop...
Page 39: Expansion Valve Piping
Distributor nozzles sized for acceptable performance for a range of conditions are factory supplied. Use the AHU (Air-Handling Unit) selection program in the Carrier electronic catalog to select optimal nozzle sizes. Replace factory nozzle as necessary for best performance. See Fig. 42.
Page 40 Table 13 — Direct Expansion Coil Circuiting Data LARGE FACE AREA (39LA, 39LD) UNIT SIZE CIRCUITING TYPE Half Full Half Full Half Full Half Full Half Full CFM AT 550 FPM 1996 3245 4345 5247 6149 FACE AREA (sq ft) 3.63 5.90 7.90...
Page 41 Table 13 — Direct Expansion Coil Circuiting Data (cont) SMALL FACE AREA (39LB, 39LC, 39LF) UNIT SIZE CIRCUITING TYPE Half Full Half Full Half Full Half Full Half Full CFM AT 550 FPM 1496 2596 3619 4372 5126 FACE AREA (sq ft) 2.72 4.72 6.58...
Page 42 Table 14 — Distributor Part Numbers SPORLAN PART NO. CONNECTION NOZZLE OD (in.) TUBES Sporlan Carrier Type Size 1112-2-1/4 EA07NC261 1112-3-1/4 EA07FC027 1112-4-1/4 EA07NC262 1112-5-1/4 EA07NC263 0.88 3/4 to 12 1112-6-1/4 EA07NC264 1113-7-1/4 EA07HC207 1113-8-1/4 EA07HC208 1115-8-1/4 EA07KC240 1115-9-1/4 EA07KC241 1.12...
Page 43: Unloading Considerations
UNLOADING CONSIDERATIONS SPECIAL PIPING WITH 4 SPLITS PER COIL Direct expansion coils can have two intertwined refrigerant cir- Manifolding for 2-Face Splits cuits. In addition, quarter, half, full and double circuiting configu- Refer to Fig. 45 and externally manifold as follows: rations are offered to allow optimum system performance and oil Connect the 4 expansion valves to the 4 distributors on each return at full and part-load operation.
Page 44 TXV — Thermostatic Expansion Valve Fig. 45 — Face Split Coil Manifolding (Typical) TXV — Thermostatic Expansion Valve Fig. 46 — Row Split Coil Manifolding (Typical)
Page 45: Electric Heaters
multistage heaters, wire stage no. 1 so that it is first stage on, last Electric Heaters stage off. Connect thermostats as required. Electric heaters may be factory installed or drop shipped to the jobsite and field installed. The heater can only be installed in the preheat-electric section.
Page 46 NOTE: All wiring must be copper and must conform to the NEC (National Electrical Code) Fig. 48 — Typical Electric Heater Wiring Schematic...
Page 47 Table 16 — Electric Heater Data 208/3/60 VOLTS 240/3/60 VOLTS 480/3/60 VOLTS 380/3/50 VOLTS NOMINAL UNIT HEATER NO. OF HEATER TEMP COIL FACE SIZE AREA CONTROL COIL RISE Total Total Total Total VELOCITY MCA† Sub- MOCP MCA† Sub- MOCP MCA† Sub- MOCP MCA†...
Page 48: Discharge Modification
discharge without any additional parts. (NOTE: This does not ap- Table 17 — Field Wiring for Incoming Conductors ply to a model change conversion.) All mounting holes are Sized for 125% of Heater Load prepunched. To convert a 39L fan, note the following: LOAD AMPS* LOAD AMPS* WIRE SIZE...
Page 49: Start-Up
LEGEND THF — Top Horizontal Front THR — Top Horizontal Rear UBF — Upblast Front UBR — Upblast Rear Fig. 50 — Fan Discharge Positions, Sizes 21 and 25 START-UP Check List Make a walkway inside unit components to protect insulation. Re- move all construction debris from unit interior.
Page 50: Coils
Then: SERVICE Motor Rpm x Motor Sheave General Pitch Diameter (in.) Place a suitable walkway to protect floor insulation whenever Fan Rpm = Fan Sheave Pitch Diameter (in.) entering the fan section. Example: Review Safety Considerations at beginning of these instruc- tions.
Page 51: Air Drying Method Of Coil Protection
If solution is too weak, add more antifreeze until desired These parts should be field-installed onto the coil before placing the coil into the unit. Once the baffles are installed, install the coil strength is reached, then circulate solution through coil for 15 with the downstream bottom of the coil attached to the upright minutes or until concentration is satisfactory.
Page 52 SIDE HAIRPIN SIDE HAIRPIN TOP COIL TOP COIL SIDE HEADER SIDE HEADER SEE TOP SEE TOP BAFFLE BAFFLE BAFFLE BAFFLE BAFLE BAFLE FLANGE DETAIL FLANGE DETAIL BOTTOM BOTTOM MOUNTING MOUNTING FLANGE FLANGE BOTTOM COIL BOTTOM COIL BAFFLE BAFFLE TOP FLANGE DETAIL TOP FLANGE DETAIL Fig.
Page 53: Vertical Unit Slant Coil Removal (39Ld Units)
VERTICAL UNIT SLANT COIL REMOVAL (39LD UNITS) Remove screws from inside baffle (Item 14). Leave baffle attached to left side panel (Item 16). NOTE: Item numbers are in Fig. 55. Remove left side panel (Item 16). Refer to Fig. 10 for service area clearance. Support of fan section may be required after removal of side Disconnect piping (Item 6).
Page 54: Horizontal Or Vertical Unit - Dual Coil
HORIZONTAL OR VERTICAL UNIT — DUAL COIL Remove side panel(s) (Item 6). REMOVAL (39LA, LD UNITS — SIZE 25) NOTE: Vertical units may require support of fan section after removal of side panels. NOTE: Item numbers are in Fig. 56 unless otherwise indicated. If accessory is present, remove accessory side panel (Item 1) Refer to Fig.
Page 55: Changing Coil Hand
HORIZONTAL OR VERTICAL UNIT — VERTICAL COIL NU-FIN COILS REMOVAL (39LB,LC,LF,LH UNITS) The NuFin coil is airflow direction sensitive, especially when used in dehumidifying applications. Hydronic versions are counterflow Item numbers are in Fig. 57 unless otherwise indicated. circuited for full gravity draining when installed level. Refer to Fig.
Page 56: Direct Expansion Coils
FILTER SECTIONS various catalogs and in the ASHRAE Fundamentals Handbook and in the Carrier System Design Guide — Piping Section, when See Table 18 for filter data. Filters are field-supplied. the entering-air temperature to the coil falls below 35°F. These Flat filter section can use 2 in.
Page 57 b. Add a few drops of oil after cleanup of shaft end. Fan Shaft Bearing Removal Lock open and tag electrical disconnect. CAUTION Enter through fan section access door or remove panels as required. It should not be necessary to drive a new bearing onto shaft. If Place plywood or other rigid covering on floor to protect light tapping is needed, do not tap against outer race.
Page 58 SIZE 21 16” 20” 25” 25” 25” SIZE 25 20” 25” 20” 20” 16” 16” Fig. 59 — Filter Arrangement, 2-in. and 4-in. Flat...
Page 59 11. Field balancing of shaft and wheel is recommended. Fig. 60 — Fan Shaft and Bearing Removal IMPORTANT: Replacement shafts must have a diameter + .0000 tolerance at bearing mount of nominal. Carrier- – .001 specified parts are recommended. Lubrication MOTORS Lubricate in accordance with nameplate attached to motor or with manufacturer’s recommendations included with motor.
Page 60 NOTE: Reinstall the components in reverse order. Fig. 65 — Remove Fan Fig. 63 — Remove Fan Discharge Panel © 2022 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53390030-01 Printed in U.S.A.

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Carrier 39LA-25 Installation, Start-Up And Service Instructions Manual

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